Enantioselective Recognition Ability Research Articles

Synthesis and Enantioselective Discrimination of Chiral Fluorescence Receptors Bearing Amino Acid Units

AbstractTwo chiral fluorescence receptors (1, 2) were synthesized, and their structures were characterized by IR, 1H NMR, 13C NMR, mass spectra and elemental analysis. The chiral recognition of receptors was studied by 1H NMR and fluorescence spectra. The results demonstrate that receptors and dibenzoyl tartrate anion formed a 1:1 complex. The receptor 1 exhibited a good enantioselective recognition ability toward the enantiomers of dibenzoyl tartrate anion.

Fluorescent enantioselective receptor for S-mandelate anion based on cholic acid

A chiral fluorescent receptor 1 based on cholic acid was designed and synthesized. The enantioselective recognition ability of 1 to mandelate anion was studied by the fluorescence in CH 3CN and a 1H NMR spectroscopic method. The results indicate that 1 exhibited a good enantioselectivity to the enantiomer of the mandelate anion in CH 3CN.

Enantioselective recognition by optically active chiral fluorescence sensors bearing amino acid units

Chiral fluorescence receptors 1 and 2 were synthesized and their structures characterized by IR, 1H NMR, 13C NMR, MS spectra, and elemental analysis. The chiral recognition abilities of 1 and 2 were studied by 1H NMR and fluorescence spectra. The results demonstrate that receptors 1 and 2 with bis(tetrabutylammonium) dibenzoyl tartrate formed a 1:1 complex. Receptor 2 exhibits an excellent enantioselective recognition ability toward the enantiomers of bis(tetrabutylammonium) dibenzoyl tartrate.

Chiral Fluorescent Receptors Based on (R)‐1,1′‐Binaphthylene‐2,2′‐bisthiourea: Synthesis and Chiral Recognition

AbstractTwo chiral fluorescent receptors 1 and 2 based on (R)‐1,1′‐binaphthylene‐2,2′‐bisthiourea were synthesized, and their chiral recognition properties for enantiomeric mandelate anions were studied by fluorescence spectra and molecular modeling. Addition of the L‐ and D‐mandelate anions caused considerable fluorescent increases in the fluorescent intensity of the host solution. The L‐enantiomer can enhance the fluorescence intensity of 1 much more than the D‐enantiomer can do, and 1 shows a better enantioselective recognition ability than 2.

Syntheses and enantioselective recognition of chiral poly(phenyleneethynylene)s bearing bulky optically active menthyl groups

Two optically active poly(menthoxycarbonylphenyleneethynylene)s were synthesized by polycondensation using a palladium–copper catalyst system. All polymers showed Cotton effects in the absorption region of the main chain, implying that chirality is induced to the main chain. Moreover, these chiral polymers showed the enantioselective recognition ability for chiral menthol in the circular dichroism (CD) spectra.